"Google has revealed that it has no plans to develop dedicated apps for Windows 8 or Windows Phone 8 for its business app products such as Gmail or Drive." Product management director for Google Apps, Clay Bavor, told V3 that Google "will go where the users are but they are not on Windows Phone or Windows 8". Ouch - but for now, hard to argue with.

All of the 3 players here; apple, microsoft, and google do not mess around when it comes to enforce their patents. I assume microsoft would have sought similar sales bans if the targeted android vendors had refused to pay the requested per-device fees to microsoft.